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Queen Elizabeth was caught on camera saying Chinese officials were "very rude" to the British ambassador during a state visit to Britain by President Xi Jinping last year.
She made the comments at a garden party at Buckingham Palace on Tuesday (May 10), the same day Britain's Prime Minister, David Cameron, was filmed making undiplomatic remarks about Nigeria and Afghanistan being corrupt countries.
His comments were especially awkward as he is hosting both countries' leaders at an anti-corruption conference in London on Thursday (May 12), while the queen's comments are not helpful to the British government's determined efforts to court Beijing to boost trade ties with China.
Under her constitutional role, the 90-year-old monarch never makes any politically or diplomatically sensitive comments in public, and it is rare for the content of her private conversations to be revealed.